The implementation and subsequent evaluation of the PLATO IV system in an Air Force vehicular maintenance training program are described. Outcomes of this project, which was designed to test the effectiveness of the PLATO IV instructional system in a technical training environment, indicate that PLATO could be successfully incorporated into the technical training process, and that its training effectiveness, impact on attitudes, reliability, and utility are acceptable. The only major drawback found was the relatively high cost of PLATO as compared with costs for other forms of training for similar applications. Appendices contain survey forms and course development plans used in this project. (CMV)